Conditions For Setting The Dtc - Suzuki XL7 2007 Service Manual

1A-87 Engine General Information and Diagnosis:

Conditions for Setting the DTC

The ECM detects that a primary HO2S voltage is greater
than 1,080 mV for greater than 4 seconds or for a
cumulative 50 seconds.
Action Taken when the DTC Sets
DTCs P0132 and P0152 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0132 and P0152 are Type B DTCs.
Reference Information
Schematic Reference
"Engine Controls Schematics"
Connector End View Reference
• "Engine Control Module Connector End Views"
• "Engine Controls Connector End Views"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
DTC Type Reference
"Powertrain Diagnostic Trouble Code (DTC) Type
Definitions"
Scan Tool Reference
• "Scan Tool Data List - Engine Controls - 3.6L (LY7)"
• "Scan Tool Data Definitions - Engine Controls - 3.6L
(LY7)"
• "Scan Tool Output Controls - Engine Controls - 3.6L
(LY7)"
Circuit/System Verification
1. Engine idling, observe the HO2S voltage parameter.
The voltage should fluctuate above and below the
range of 350-550 mV.
2. If the vehicle passes the Circuit/System Verification
test, then operate the vehicle within the conditions
for running the DTC. You may also operate the
vehicle within the conditions that are captured in the
Freeze Frame/Failure Records Data List.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at
the appropriate HO2S sensor.
2. Ignition ON, verify that the HO2S voltage parameter
is between 350-500 mV.
➢ If less than the specified value, test the signal
circuit for a short to ground. If the circuit/
connections test normal, replace the ECM.
➢ If greater than the specified value, test the signal
circuit for a short to voltage. If the circuit/
connections test normal, replace the ECM.
3. Install a 3A fused jumper wire between the signal
circuit terminal B and ground. Verify the HO2S
voltage parameter is less than 60 mV.
➢ If greater than the specified value, test the signal
circuit for an open/high resistance. If the circuit/
connections test normal, replace the ECM.
4. Connect a 3A fused jumper wire between the signal
circuit terminal B and the low reference circuit
terminal A. Verify the HO2S voltage parameter is
less than 60 mV.
➢ If greater than the specified value, test the low
reference circuit for an open/high resistance or for a
short to voltage. If the circuit/connections test
normal, replace the ECM.
5. Verify that the following conditions do not exist:
– Leaking fuel injectors—Refer to "Fuel Injector
Balance Test with Special Tool: " or "Fuel Injector
Balance Test with Tech 2: ".
– High fuel system pressure—Refer to "Fuel System
Diagnosis: ".
– Fuel that is contaminated—Refer to "Alcohol/
Contaminants-in-Fuel Diagnosis (w/o Special
Tool): " "Alcohol/Contaminants-in-Fuel Diagnosis
(w/ Special Tool): ".
– Restricted exhaust.
➢ If you find any of the above conditions, repair as
necessary.
6. If all circuits/connections test normal, replace the
HO2S sensor.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Heated Oxygen Sensor Replacement - Bank 1
Sensor 1: "
• "Heated Oxygen Sensor Replacement - Bank 2
Sensor 1: "
• "Control Module References: " for engine control
module replacement, setup, and programming